Machine for making insulated nails



March 23,1926.

C. C. BLAKE MACHINE FOR MAKING INSULATED NAILS March 23 1926. 1,578,185

c. c. BLAKE MACHINE FOR MAKING INSULATED NAILS Fi h ts-Sheet '2 March 23 1926.

C. C. BLAKE MACHINE FOR MAKING INSULATED NAILS s shee ts she et 5 Filed March 4. 1922 Much 23 {1926.

c, c. BLAKE MACHINE FOR MAKING INSULATED NAILS I ,s-nmas- 5 Shjeets-Sh ,ZZZ'

Filed March 4, 1922 C C BLAKE MACHINE FOR MAKING INSULATED NAILS,

Patented Mar. 23, 1926.

UNiTED STATES CHARLES C. BLAKE, OF BROOKLINE, MASSACHUSETTS.

MACHINE FOR MAKING INSULATED NAILS.

Application filed March 4, 1922. Serial No. 541,114.

To (ZZZ whom it may (once m.

Be it known that I, Cimnnics C. BLAKE, a citizen of the United States, residing at Brookline, in the county of Norfolk and St ate of Massachusetts, have invented certain new and useful In'iprovements in Machines for Making Insulated Nails, of which the following is a specification.

This invention relates to machines for making insulated nails of the type disclosed in Letters Patent of the United States No. 1.366,661 dated June 30. 1920 to Bennett Gr. Jan'sson, and more particularly to improvements in the machine for making such nails disclosed in my Patent No. 1,411,951, April a 1922.

In said prior machine means is provided for feeding two of the three elements comprising the insulated nail, namely a wire nail and a wood block, to a rotary turret on which they are assembled and then carried to a capping station. At the capping station the wood block is compressed on the wire nail and is bound in compressed condition by application of the third element of the nail, namely a fibre cap. The completed nail is then ejected. The general principles of the machine of said patent are embodied in the machine of the present invention, the object of the invention being to improve the operation of the prior machine in certain particulars. To this end certain novel features of the present invention relate to improved mechanism for transferring and assembling the several elements of the nail. the means for supplying these elements to the machine being the same as is disclosed in said patent. Other novel features, which will readily be recognized by those skilled in the art, will be apparent from the following description.

To the accomplishment of the object named the invention comprises the features, combinationsand arrangements of parts hereinafter set forth, the preferred form of the invention being illustrated in the accompanying drawings, in which:

Figure 1 is a front elevation ofthe working parts of the machine; Fig. 2 is a rear elevation. of the parts shown in Fig. l, but showing in additionthe driving mechanism; Fig. 3 is a vertical section, in left side elevation, through the nail-delivering and capping stations; Fig. 4; is a detail, in sectional plan. of the nail transferring and fibre strip feeding mechanisms; F igl. 51S a detail? in left side elevation, of the parts shown in Fig. 1; Fig. 6 is a section, in plan, of the plunger mechanism at the block transferring center punching and nailing stations, Fig. 7 is a sectional detail of the block transferring station; Fig. 8 is a sectional detail of the center punching station; Fig. 9 is a sectional detail of the nailing station; Fig. 10

is a sectional detail of the capping station before the cap has been dinked from the fibre strip; Fig. 11 is a sectional detail of the capping station. after the cap has been dinked and the assei'i'ibled nail and block delirered to this station; Fig. 12 is a sectional detail of the cap ing station showing the cap being formed; Fig. 13 is a sectional detail of the capping station showing the insulated nail completely formed; Fig. 1% is a sectional detail of the capping station showing the ejection ofthe insulated nail; and Fig. 15 is a detail in sectional elevation of the insulated nail made by the machine.

The insulated nail (Fig. 15) produced by the machine embodying the features of the present invention comprises a nail 1 having a wooden cleat '2 thereon which is provided with a teat 3 to facilitate its passage between a pair of telephone wires 1. The cleat 2 is compressed upon the nail 1 and is bound in compressed condition on the nail by a binder or cap 5 molded from a disk of fibre. Referring now to Figs. 8 to it for a preliminary general description of the machine for making the insulated nail illus trated in Fig. 15, the three materials used in making the insulated-nails, namely, the nails 1, the cylindrical wooden blocks for the cleats 2, and. the fibre for the caps 5, are stored in storage stations from which they are drawn as needed and assembled at a forming station where the three parts of the insulated nail are united. To this end the machine is provided with a rotary turret 6, the construction of which will presently be described, having ten pockets 7 therein (Fig. 3). The turret 6 is rotated in a step by step manner to register each offithe pockets 7 successively with an opening 8 at a block inserting station A (Figs; land?) The inserted block 2 is carried during the next; rotative movement of the turret 6 to a block center-punching station B (Figs. 4 and 8) where the block 2 is punched at 9 to accurately determine the position of the nail 1 which is driven throu'ghthe block 2 at anaiLdriv-ing station 9- 9) which the block reaches at tl.e end of th ferred to. lVith these connections the tursecond rotative step of the turret Atret 6 is rotated in a step-by-step manner to the end of the seventh rotative step of the register the pockets 7 successively with the turret (3 the block and nail are registered station A, where the blocks 2 are inserted. at the nail forming station 1) figs. 1 and To this end the machine is provided with 10 to 1-1). At the station 1) the bier: and a block trans'terrer 51 (Figs? 5. 6 and 7) nail are positioned within a die having supporting Ways 11 for a strip or fibre 12 (Fig. 10). The die holder 10 is provided with adinker 1.3 which dinks out a disk or cap (Fig. 11) from the strip o't libre. The dinker 13 is normally lield'elevated to clear the strip of tibre by a coiled spring 14 and is depressed to dink out the cap 5 by a plungr 15 having a buttonshaped cavity 16 therein which co-operates with the upper end or the dinkcr to term a die cavity 18. After the cap 5 is dinked out of the strip of fibre by the (linker 13 hollow plunger 19 (Fig. 11) elevated T L and lifts the block with its contained nail out of the pocket 7 and pushes the assembled cap, block and nail up through the .ricted throat 17 ot the dinl-zer (Fig. 12). Luring this movement oi the plunger 1?) the cap 5 is provided *ith a circumferentially depending skirt molded over tile top of the block 2 into the wood ot which it slightly sinks (Fig. 12). 'ihercalter continued ele vation of the plunger 19 forcibly pushes the nail, block and molded cap into the die cavity 18 (Fig. 13) thereupon the block s compressed upon the nail and molded within the depending skirt of the cap. At the same time the upper end 20 or the plunger 1%) erms the teat 3. The plunger 15 is then elevated and an ejector 21 pushed up through the plunger 19 to eject the termed insulated nail from the machine (Fig. 1%).

The turret 6 (Fig. 4.) moves during its rotative movement over the upper end of a long bearing (Fig. 2-3) formed in an extension piece of a vertical g der 2i having at its lower end a horiz .l plate (Fig. 2) bolted to the top of a table as. The turret 6 is secured to the upper end of a vertical shaft 28 journaled in the bearing 23 and another bearing 29 1) formed on a girder 3O bolted to the bottom of the plate 25. At its lower end the shaft 28 carries a pin wheel 31 (Fig. which is driven intermittently by an irregular worm 32 on a short shaft 3 journaled in the girder 30. The shaft 33 carries a bevel gear 34; which meshes 'ith a sumlar gear at the lower end of a vertical cam shatt- 86 journaled in the girders 21 and 30. The

. rotatedfilrom a counter shaft iournaled in bearings carried by the table 26, driven treat an electric motor. The rotation 0t tne countershaft is controlled by a clutch, under control of the operator, all as illustrated and described. in said. patent hereinbei'ore rfewhicli lifts the blocks 2 one at a time, from a chute 52 and inserts them in the pocket 7 of the turret 6 which is registered with the opening 8 7). The opening 8 functions as a guideway between the lower end of the raceway and the under side of the turret, and is formed in a block 38 secured to a bracket 39 on the girder 24. The block 38 provides a terminal tor the end of the block raceway. The block transferrer 51 is secured to a slide 53 (Fig. (5) mounted to slide in ways formed on the girder 2% beneath gibs The slide 53 is connected by a link 55 (Fig. 1) to one end Off a lever 56 pivoted on a stud 57 supported by a bracket 58 (Fig. 2) secured to the bearing The other end 01": the lever 56 is provided at its free end with a roll 60 engaging a cam groove 61, formed in the peri aheral face of a disk 62 on the shaft 36 and shaped to give the proper reciprocating movement to the transferrer 51 through the connections described. The block chute 52 is kept full of blocks by means of a block separating and delivering mechanism 152 (Figs. 1 and 2) in all respect like that described and (flt\l1l'l(l in my eo-pending application Ser. No. 510,768 filed Oct. 27, 1921 now Patent No. 1,511,258, Oct. 14:, 192st. At each withdrawal oi the transit'errer 51 a block is delivered to the position of the block 2 in Fig. 7 r ady to be delivered to the turret on the next advance of the transterrer.

The machine as described thus tar, is the same as the machine of said Patent No. 1,511,951 except for the construction of the turret 6 and the mode of carrying the blocks 2 from station to station for the successive operations which eventually form the insulated nail. This novel construction and mode of operation will now be described.

The rotary turret (3, (Figs. 3 and 1) comprises a base plate (53 driven on the upper end of the shaft 28, a supporting block (34, barring a peripheral rabbet, pinned to said shaft, and a pocket holdiug ring ca titled into said rabbet. The pockets flllll'Jl'lfFO thinibles 66 seated in each of the ten vertical bores in the ring 65. the bores and the thimbles having the shape shown in detail in Figs. 7 to 1%, and each thimble being held in its pocketby a seating ring .67. l ltltll thimblefnear its lower end, has an internal peripheral bead near its upper end, has a similar bead ('59, see Fig. 10.. These beads present a. circular opening of such diameter that a block 2 may be 't'rictionallyheld thereby 1. o e end or the other'ot' a pocket 7; i

-ih seating ring,

" nailer anvil 72.

A block 2 having been delivered by the chute 52 against the terminal block 38, the plunger 51 is operated to force the block through the guideway 8 and into the pocket 7 then in registry with the guideway at the block inserting station A (Fig. The bead 68 holds the block in the pocket while the turret rotates a step and brings the block to the center-punching station B.

Attention is now directed to the formation of the slide (Figs. 1, b' and 6). The slide 53 is provided with a horizontal bracket 70 which supports, in addition to the block transferrer 51, a cente1-punch anvil Tl and a The location of the two anvils and the block transferrer on the slide is on the arc of a circle the radius of which is the same as the radius of the circle passing throu h the centers of the turret pockets, and their angular spacing is the same as that of the pockets. \Vhen the block (Fig. 7) reaches station B the succeeding upward movement of the slide 53 causes the'anvil T1 to engage the block and, due to the heightof the anvil, force the block into engagement with the upper head 69 of the pocket 7. The block is supported by the anvil 71 until the completion of the center-punching operation by the punch 73 which is attached to the slide 7 L (Fig. 1) reciprocated in timed relation to the turret movements by a cam in a cam disk 75 on the shaft 36, all as described in said Patent No. 1311,951.

The next step of the turret brings the punched block to the nailing station C (Fig. i). The operation of the machine has previously caused the picker 76 (Fig. 1) to pick a nail from the raceway 77 and deposit it in the throat 78 (Fig. 3) below the nail driver 79. The raceway T7 is maintained full of nails by a nail delivering mechanism like that described and claimed in my said Patent No. 1,511,258. The nail-driver is at tached to and operated by the center-punch slide 7%, and the picker is operated by a cam in a. cam disk 80 on the cam shaft 36, all as described in said Patent No. 1,411,951. Prior to a descent of the nail-driver the rise of the slide has brought the nailer anvil 72 to a position flush with the lower face of the pocket 7 containing the punched block at its upper end, or projecting slightlv within said pocket according to whether long or short nails are being fed. The subsequent descent of the nail-driver 79 places the point of the nail in the center punch 9 and then ,forces the nail and block downwardly within the pocket until the block engages the anv11 72. Thereupon continuedpressure from the nail driver forces the pointof the nail through the block and into the open end of' the anvil 72, as shown 1n Fig. 9 for a long nail.

pockets with means for holding a blink at 1 cripple.

The reason for constriictii1g-: tl1e naileither the upper or lower end thereof will now be apparent. The nail must be driven so as to project from the block normal to its surface, otherwise the teat 3 will be misformed resulting in a crippled nail. If the nail, after leaving the throat 78, has to drop on the block there is danger of its being driven at an angle to the surface. By seating the block at the upper end of the pocket for the center-punching operation it is then presented to the nailer while in the same location, and'tho nail point enters the punch through the block, accuracy in forming the head at the capping station is insured. 1n the machine of said Patent No. 1,et11,951, where the nail was driven through the block until its head was seated in the punch 9, a very slight tilt on the nail caused it to be engaged by the'upper end of the plunger 19 'at the capping station resulting in a lVith the moderate projection of the nail provided by the present mode of operation this difliculty is wholly obviated.

From these considerations it will be understood that it is important that nails of both lengths be driven only partially through the block at the nailing station. It is convenient to so design the machine as to provide for the projection of either a long or a short nail below the lower surface of the block for the same distance. Accordingly the nailer anvil is made vertically adjustable in the bracket 70 of the slide The anvil 72 is seated in a vertical bore in the bracket 70 the height of its upper end above the bracket being varied by removing a locking pin 81 (Fig. 3) from one of two transverse holes 82 in the bracket and slipping it into the other, the anvil mean while being moved vertically to bring a pin receiving recess at its lower end opposite the hole in which the locking pin is to be seated. The distance between the holes 82 is equal to the difference in length between the nails. Thus the block may always be supported within the pocket of the turret at an'elevation to be penetrated equally by long or short nails forced therein by the nail-driver, which has a driving stroke of constant length."

which i rovides ferthe ejectioiiof the first twonails dri en from the direct-'78 betere a block 2 reaches station C, will now be explained. The nailer anvil 7 2 is tubular and receives within it a nail ejector 83 (Fig. 3) which is secured by its lower end in a fixed tn-aeket 8-1 fastened to the long bearing 23 oi? the shalt 28. Thus all nails driven from the throat T8, when the registering pocket 7 is en'ipty, are received within the anvil 72 and when the slide 50 recedes the ejector 83 topples these nails from the end of the anvil T2.

The remaining steps in "forming the nail are as already brietly described and as fully described in said Patent No. 1,411,951. The turret carries the assen'ibled block and nail. as shown in Fig. 9, step by step to the capping station 1). Meanwhile the feed rolls driven by gearing from the shaft 28, as shown in Fig. i, have advanced the insulating strip 66 in the guideway 11 ready to be cut into caps and compressed on the block in the die cavity 18. There is enough resistance ol'lered by the (linked cap 5 (Fig. 11) to cause the block 2 to he slid on the nail 1 until the head of the nail is seated in the center-punch 9, before the cap is forced into the restricted throat 17 of the clinker l3 i After the nail is completely former (Fig. 13) the ejector 21 topples the nail into the chute 87 (Fig. 3) which directs it to a suitable container.

"lhe clinker 13 and plunger 15 are operated from a cam in a cam disk 88 on the cam shai't 36, and the plunger 19 and ejector 21 are operated from cams 89. and 90, respectively, on said shatt. all in the same manner as described in said Patent No. 1,411,951. An additional feature has, however, been added to the prior machine to prevent breakup should a nail become jammed in the die cavity. The cam groove in the disk 88 iints constant throw to the slide 91 (Fig. 3) which actuates the plunger 15 and means provided to cushion the pressure from this cam should the plunger be prevented from roan-hing its lowest position. Accordingly the usual bell-crank 92 carrying the cam roll, connected to the slide by the link 93, is mounted on a floating pivot 9%. The pivot 94 is received in the adiacent forked end of a horizontal lever 95 (Fig. 2) fulcrumed on pin 96 held at one end by the frame 2i at the other by a depending bracket 97. lne other end of the lever 95 rests upon th upper end of a coiled-spring 98 carried by a headed rod 99 passing through a lug 100 on the frame and the end of the lever. The strength of the spring is determined by the usual adjusting nuts as shown in Fig. 2. The eliect will readily be understood. It the plunger .15 meets an obstruction, as soon as the pressure applied from the cam 88 be- (oines greater than the" strength of the spring 98. the spring will yield causing the floating pivot-t0 r se the cam-se l is s lie ell crank lever 92 and lever 95 pivoting as a single element on the pin 96.

The sequence of operations has been seti'orth in connection with the description ot the features of the machine and attention need only be drawn to the fact that the turret and co-operating parts ensure the ejection of waste nails or varying lengths and also the transfer of such nails from the nailing station to the capping station without loss from the turret. lVith the construction described the capping station is continuously supplied with assembled nails and blocks thus making certain the rapid manufacture of completed nails, and while the present invention shows and describes a particular means to gain this end, which is convenient and readily controlled, it is comprehensive in this and other respects, as delined in the appended claims, it being ob vious that those skilled in the art may devise various mechanical devices to carry the inention into practical effect.

What is claimed as new, is

1. A machine for making insulated nails of the type described having, in combination, a. rotary turret, mechanism for rotating said turret step-bystep, said turret having a series of peripherally arranged pockets presenting chambers which remain open at both ends throughout their travel, a device for supp-lying said pockets successively with blocks through one open end at each period of rest, means operating simultaneously with said block supplying device to support two previously supplied blocks for opera tions thereon through the other open ends of the pockets containing said blocks, and means for successively removing the blocks from the pockets and completing the formation of the nails.

A machine for making insulated nails ot' the type described having, in combination, a rotary turret, mechanism for rotating said turret step-by-step, said turret having a series of peripherally arranged pockets presenting chambers which remain open atboth ends throughout their travel, a devic for supplying said pockets successively with blocks through one open end at each period of rest, means movable toward and from said turret at each period of rest to sup port two previously supplied blocks for operations thereon through the other open ends of the pockets containing said blocks, and means for successively removing the blocks from the pockets and completing the formation of the nails.

3. A machine for making insulated nails of the type described having, in combination, a rotary turret, mechanism for rotating said turret step-by-step, said turret having a series of peripherally arranged pockets presenting chambers which remain open at both ends throughout their travel, a device for supplying said p ckets successively with blocks through one open end, a slide for supporting said device, a pair of anvils also supported on said slide, means for advanc ing said slide to supply a block to' one pocket and present the anvils in block-supporting position at two adjacentpockets previously supplied with blocks, and means for operating on the blocks so supported by the anvils, said operations taking place at each period of rest of the turret.

a. A machine for making insulated nails of the type described having, in co1nbination, a rotary turret,mechanism for rotating said turret stepy-step, said turret having a series of peripherally arranged pockets presenting chambers which remain open at- 30th ends throughout their travel, a device for supplying said pockets successively with blocks through one open end at each period of rest, means opera-ting sin'iultaneously with said block supplying device to support two previously supplied blocks in other pockets, and means for center-punching the block held at one pocket and driving a nail in the block held at the other pocket, said operations taking place at each period of rest of the turret.

A mac-nine for making insulated nails of the type described having, in combination, rotary turret, mechanism for rotating said turret step-by-step, said turret having a series of peripherallyarranged pockets presenting chambers which remain open at both ends throughout their travel, a device for supplying said pockets successively with blocks through one open end, a slide for supporting said device, a pair 01" anvils also supported on said slide, means for advancing said slide to supply a block to one pocket and present the anvils in block-supporting position at two adjacent pockets previously supplied with blocks, and means for simultaneously center-punching and nailing said two blocks.

6. In a machine for making insulated nails ot' the type described, an intermittent ly driven shaft, a nail carrying turret tecured thereto comprising a disk-like structure having a series of peripheral blockreceiving pockets, open at both ends, and means within each pocket for holding a block therein during the travel of the turret '7. In a machine for making insulated nails or the ype described, an intermittently driven shaft, a nail carrying turret secured thereto comprising a disk-like structure having a series of peripheral blockre:civing pockets, open at both ends, a thimble seated within each pocket constructed to permit the block to pass therethrough, and means for holding each thimble in position.

8. In a machine for making insulated nails of the type described, an intermittently driven shaft, and a nail carrying turret secured thereto comprising a disk-like structure having a series of peripheral blockreceiving pockets, open at both ends, said.

pockets having means for supporting a block at either the upper or the lower end of the pocket.

9. In a machine for making insulated nails ot the type described, an intermittently driven shaft, a nail carrying turret secured thereto comprising a disk-like structure having a series of peripheral blockreceiving pockets, open at both ends, and a thimble within each pocket constructed to permit the blocks to pass therethrough constructed to present a restricted opening near one face of the turret.

10. In amachine for making nails ot' the type described, an intermittently driven shaft, a nail carrying turret secured thereto comprising a disk-like structure having a series of peripheral blockrerceiving pockets, open at both ends, and a thimhle within each pocket constructed to permit the blocks to pass therethro-ugh having a peripheral internal bead near one end thereof forming a re: pocket.

11. In a machine for making insulated nails ot' the type described, an intern'iittently driven shaft, and a nail carrying turret secured thereto comprising a disk-like structure having a series of peripheral block-receiving pockets, open at both ends, said pockets having means near the upper and lower faces of the turret for holding a block frictionally at one end of the pocket.

12. In a machine for making insulated nails of the type described, an intermittently driven shaft, a nail carrying turret secured thereto-comprising a disk-like structure having a series of peripheral block-receiving pockets, open at both ends, means in the pockets for holding a block trictionally at the ends thereof but loosely at the center, and means for supplying said pockets with blocks.

13. A machine for making insulated nails comprising a nail and a block having, in combination, an intermittently rotating turret having a series of peripheral block-receiving pockets, means for supplying blocks successively to said pockets at a bloclosupplying station, means for simultaneously delivering nails at a nailing station beyond said block supplying station in the travel of the turret, and means for ejecting-from the machine nails delivered to empty pockets at the start of the nail making operation.

1%. A machine for making insulated nails comprising a nail and a block having, in combination, a rotary turret having a series of peripheral nail-holding pockets, means for rotating the turret step-by-step, means operating during. a period of rest for sup insulated ricted opening to the plying a block to one pocket and means simultaneously delivering a nail to another pocket one or more stations beyond the pocket receiving the block, and means at the nail delivering station for ejecting said nail from the machine before the block reaches said station through the travel of the turret in case the pocket receiving the nail is not supplied with a block.

15. A machine for making insulated nails comprising a nail and a block having, in combination, a rotary turret having a series of peripheral nail-holding pockets, means for rotating the turret step-by-step, means operatin during a period of rest for supplying a block to one pocket and means s1- multaneously delivering a nail to another pocket one or more stations beyond the pocket receiving the block, a hollow anvil the nail delivering station to receive said nail in case the pocket is not supplied with a block, and means for ejecting said nail from the anvil and the machine.

16. A machine for making insulated nails comprising a nail and a block having, in combination, a rotary turret having a series of peripheral nail-holding pockets, means for rotating the turret stepby-step, means operating during a period of rest for supplying a block to one pocket and means simultaneously delivering a nail to another pocket one or more stations beyond the pocket receiving the block, an anvil movable into and out of position to support a block at said nailing station and constructed to support the nail in case there is no block in the pocket, and means to eject said nail from the machine when the anvil is retracted from the pocket.

17. A machine for making insulated nails comprising a nail and a block having, in combination, a rotary turret having a series of peripheral nail-holding pockets, a block supplying station, a nailing station, means for rotating the turret step-by-step to present the pockets successively to the block supplying station and the nailing station, means for supplying a block and means for supplying thereafter a nail to each pocket, a nail-driver at the nailing station, and means for supporting the block at the nailing-station in position to cause the driver to drive nails of different lengths into the block with equal penetration.

18. A machine for making insulated nails comprising a nail and a block having, in combination, a rotary turret having a series of peripheral nail-holding pockets, a block supplying station, a nailing station, means for rotating the turret step-by-step to present the pockets successively to the block supplying station and the nailing station, means for supplying a block and means for supplying thereafter a nail to each pocket, an anvil for supporting the block and a nail-driver, both at the nailing-station, and means for adjusting the anvil to support blocks in dififerent locations within the pocket for driving nails of different lengths therein.

19. A machine for making insulated nails comprising a nail and a block having, in combination, a rotary turret having a series of peripheral nail-holding pockets, block supplying station, a. nailing station, means for rotating the turret step-by-step to present the pockets successively to the block supplying station and the nailing station, means for supplying a block and means for supplying thereafter a nail to each pocket, an anvil for supporting the block and a naildriver, both at the nailing-station, and means for adjusting the anvil toward and from the nail driver to accommodate the driving oi nails of different lengths into said blocks.

20. ii machine for making insulated nails comprising a nail and a block having, in combination, a i'iail-holding turret rotatable stepb y-step and having a series of peripheral pockets open at top and bottom, a slide below said turret carrying a block supplying plunger, and two anvils registering with three successive pockets, means for reciprocating said slide toward and from the turret during periods of rest whereby said anvils are positioned to supportblocks previously supplied to two of said pockets, and means for center-punching and nailing said two blocks while so supported.

21. A machine for making insulated nails comprising a nail and a block having, in combination, a nail-holding turret rotatable st -2p-b v-ste and having a series of peripheral pockets open at top and bottom, a slide below said turret carrying a centerpu11ch anvil and a nailing anvil registering with two adjacent pockets, said former anvil being nearer to the turret than the latter when in a position of rest below the turret, and means for o 'ierating the slide to causesaid center-punch anvil to enter a pocket and support the block supplied thereto at the upper end of the pocket while the nailing anvil supports the block in its pocket at the lower end thereof.

22. A. machine for makin insulated nails comprising a nail and a block having, in combination, a nail-holding turret rotatable step-by-step and having a series of peripheral pockets open at top and bottom, means for supplying blocks to said pockets, two plungers below the turret registering with adjacent pockets constructed to supportthe blocks in said pockets one at the upper end and the other at the lower end thereof, and means for advancing said plungers into engagen'ient with the blocks to so support them during periods of rest of the turret.

A machine for malring'insulated nails comprising a nail and a block having, in combination, a nail-holding turret rotatable step-by-step and having a series of peripheral pockets open at top and bottom, aslide below said turret carrying a block supplying plunger, and two anvils registering with three successive pockets, means for reciprocating said slide toward and from the turret during periods of rest whereby said anvils are positioned to support blocks previously supplied to two of said pockets, and means for center-punching and nailing said two blocks while so supported, said nailing anvil being hollow to permit the nailing means to drive the nail through the block and extend from the lower face thereof.

A machine for making insulated nails comprising a nail, a block and a cap having,

in combination, means for driving a nail partially through a block, means for supplying a cap, and means for completing the driving of the nail through the block and applying the cap to the block.

25. A machine for making insulated nails comprising a nail, a block and acap having, in combination, means at a nailing station for driving a nail partially through a block, means at a capping station for supplying a cap, means for transferring the nail and block to the capping station, and means at the capping station for forcing the nail completely into the block and moulding the cap on the block over the nail head.

A machine for making insulated nails comprisin a nail, a block and a cap having, in combination, means at a nailing station for driving a nail partially through a block, means at a capping station for supplying a cap, means for transferring the nail and block to the capping station, and means the capping station for completing the driving of the nail through the block and moulding the cap on the block in one continuous operation. I

27. A machine for making insulated nails comprising a nail and a block having, in combination, a nail-holding turret rotatable step-bystep and having a series of peripheral pockets open at top and bottom, means for supplying blocks successively to the upper ends of said pockets as each registers at a block-supplying station, means for dea livering a nail to each block at a nailing sta tion while the block is still retained at the upper end. of the pocket, a nail-driver at said nailing station, and means for supporting each block at the lower end of the pocket for the nail driving operation.

A machine for making insulated nails comprising a nail and a block having, in combination, a rotatable nail-holding turret having a'series of peripheral pockets open at top and bottom, means for supplying blocks successively to the upper ends of said pockets as each registers at a block supplying station, means for rotating said turret step-by-step to transfer the blocks to a center-punching station and then to a nailing station at which stations a center-punch and a nail-driver are respectively located, and means for retaining each block at the upper end of its pocket until it has been engaged by the nail to be driven therein at the nailing station.

CHARLES C. BLAKE. 

